Sand-reconditioning machine for foundry art



Nov., 26, 19.29e L. A. cAMERo'l-A SAND REGONDITIONING MACHINE FOR FOUNDRY ART Filed June 5. 1928 4 Sheets-Sheet l INVEN TOR.- mais i @0b/mmm,

Nove 26, 1929. L. A. CAMEROTA SAND RECONDITIONING MACHINE FOR FOUNDRY ART Filed June 5. 1928 4 Sheets-Sheet 2 NOV; 26, 1929. 1 A, CAMEROTA 1,73744 SAND REGONDITIONING MACHINE FOR FOUNDRY ABT Filed June 5. 1928 4 sheets-Sheet s im I INVENTOR- f-JE, ms @ammini l 'l v "A12" l n un@ ATTORNEYS.

Nov., A26, .1929. y L. A. CAMEROTA 1,737,144

SAND RECONDITIONING MACHINE FOR FOUNDRY ART Filed June 5, 1928 4 Sheets-Sheet 4 W I TNESSES I NV EN TOR A TTQRNEYS.

Patented Nov. 26, 1929 UNITED STATES PATENT oFFlcE Louis A. GAMEBOTA, 0F BURLINGTON, NEW JERSEY, AssIGNoB. To WALTER woon,

v oF PHILADELPHIA, PENNSYLVANIA SANDRECONIVDITIONING MACHINE FOR I OU-NDRY ART Application mea :une 5, 192s. serial No. 282,910.

My invention, has particular application to an apparatus for mixing and revivifyin'g sand, loam and other ingredients used in foundry practice for making molds. The general object of the invention is to provide an improved apparatus for the purpose of reducing the'cost and labor of handling and conveying in the process of reconditioning used sand. This end I accomplish by the provision of semi-automatic means for mlxing, aerating and finally carrying o the ma-v terials used in making molds.

supplementing these advantages are those derived from utilizing a reciproeatory carrier upon which the above described operations take place.

The various features of novelty which characterize my invention are pointed out with particularity in the detailed descrlption which follows. For a better understanding of the 1nvention, however, its advantages and specific objects attained with its use, reference should be had to the accompanyinv drawings, 1n which I have illustrated and described a preferred embodiment of the invention.

Of the drawings: U

Fig. I is a front elevatlon of the entire apparatus.

Fig. II is a plan view of the same.

Fig. III isa plan view of the sandcutters.

Fig. IV is side elevation of the sand cutters and the apparatus for varying their posltion; and, v

Fig. V is a side elevation of the sand plow.

lWith particular reference to Fig. I, the apparatus there illustrated comprises a carrier or table 1 for conveying the sand or other materials, storage bins or hoppers 2 from which the sand is deposited on the carrier 1, and the sand mixing and revlvlfylng device comprehensively designed by the numeral-'L There is also shown the spiralplow 4 utilized for carrying ofi' the materials from the carrier.

The carrier 1 is conveniently mounted on wheels 5 so that it may be propelled back and forth along the track 6, a reversible motor 20 with remote control being employed to 1mpart -a reciprocatory motion to the carrier through the medium of a speed reducer or gearing train 31.

The sand mixing apparatus 3, which is best illustrated in Figs. III and IV, is mounted on a stationary frame 9, adjacent the carrier track 6.. It comprises a pair of cutting cyl inders 7, 8 having thereon a number of helical blades 10, the construction and position of the blades, as illustrated, bein of a ltype now in use and forming no part o this invention. The cutting cylinders 7, 8 are shown mounted in bearings 21 at the ends of rocking levers or walking beams 11. The walking beams 11 in turn are centrally pivoted in bearings 22 and are'rocked by means of a hydraulic ram 12, there being a pin 19 on the walkcylinder as it revolves. In like manner the cutting cylinder 8 is designed to revolve in the opposite direction, and its yblades are oppositely inclined. The shields 17 serve to prevent sand from'being thrown by the cutters .7, 8 into the tilting mechanism.

Adjacent the carrier track 6 and mounted independently of the carrier 1 there is the sand plow or helical screw 4 used for the purposeof removing the sand from the carrier and depositing it to one side thereofinto the .pit 25, from whence it may1 be carried on a belt conveyor diagrammatica y illustrated at 26.

The plow 4 is independently driven by ay motor 27, and the entire assemblyanay be elevated above the carrier 1. For this purpose I preferably employ an air hoist 28, but it will be obvious that other elevating means may be used with "equal success. The preferred means for elevating and lowering the sand plow 4 are best shown in Fig. V. Theycomprise the air hoist-28 mounted on a beam 37 which is shown supported by complete columns 38 and which straddles the carrier track 6, and a series of pulleys 33 by, means of'which 50 the cutter would only be effective when the Y the air hoist 28 actuates a cable 32. The ends of thecable 32 are attached to an I-beam 34 which in turn carries the plow 4 and its motor 27. At theends of the I-beam 34 there are shown suitable guides 35 which co-operate with two vertical columns 36 to form a slide for, the elevating and lowering of the sand plow 4. j

Instead of a screw plow, I may employ a blade inclined at an acute angle with respect to the edge of the carrier 1 approaching the blade on the side nearest the pit 25, or I may design the blades 10 of the cutting c linders throw the sand off t etable 7 8 so that they 1 while mixing it.

Along the path of the carrier 1 and positioned close to the cutting cylinders 7, 8 are vertical shields 29 which serve to prevent the cutters from throwing sand beyond the Aby the arrow, the cutter 7 being in the lowered position. As the table moves beneath the cutter 7, the latter throws sand ahead of it mixing and aerating it, and by virtue-of the shapel of the blades 10, the 4sand is moved toward the center of the carrier. When the carrier passes beyond the cutter 7 its movement is stopped, the rocking lever'11 isactuated by the hydraulic vram 12 and the alternate cutter 8 is lowered to operative position. The carrier is then progressed in the opposite direction .and the mixing operation continues. It will be readily apparentthat the cutter blades 10 are so formed that they are. only effective when rotated in lone direction. Accordingly by the use of interchangeable or alternate cutters, the carrier, when reciprocated, performs wrk as it progresses in either direction. With the use of a single cutter,

carrier moves in one direction.

When the mixin and revivifying operation has been competed, the screw plow 4 is lowered to the level of the sand'pile and the carrier 1 moved in the direction of the arrow, thus clearing its platform4 of sand. Ob-

viousl however, instead of removin the sand rom the carrier, the carrier'itsel may be utilized to convey the materials to' another part of the foundry.

It will also be apparent that remote con- 4trols for the various motors, as well as the hydraulic ra'm 12 and the air hoist 28 for the screw plow 4, may be' located in a central position so that one operator may control and direct the entire operation. Furthermore, the operation of mixing and revivifying the sand is made a part of the conveying and handling' operation so that the mixing machine together with the'sand carrier and other a urtenances serves to transport the materias rom the storage bins to remote parts of the foundry. I

While the apparatus described is particularly adaptable for use in foundries' in connection with the reconditioning of sand, it may be utilized to4 advantage in the mixing and conveying of granular materials of various description,and while I have illustrated and described the best form of my invention now known to me, it will be apparent to those skilled in the art that changes may be made -in the form of the apparatus disclosed without departing from the spirit of my invention as set forth in the appended claims, and that certain features of the invention may sometimes be used with advantage without a corresponding usel of other features. For example,- the carrier ma be propelled by any mechanical means suc asa winch and cable or a reciprocating engine; and in place of the screw plow shown for removing sand from the carrier, I may employa scraper, a belt or other well known forms of apparatus for accomplishing this purpose. v

Having thus described my invention, I claim:

1. Av sand reconditioning machine of the class described, comprising a movable table carrying the sand to be reconditioned, a-

number of interchangeable cutting cylinders positioned above said table and independentA l thereof, means for revolving sald cyliners, and means for reciprocating said table beneath said cutting cylinders whereby the sand is reconditioned.

2. In a'sand reconditioning machine ofthe I class described, a pair. of rotary cutters, one of said cutters being adaptedto revolve in a clockwise direction and the other in a counter-clockwise direction, and means for alternately positioning said cutters for effective operation. l

3. In a sandgreconditioning machine of the class described, a plurality of cylindrical cutters having rotary cutting blades,"one of said cutters beingadapted to revolve in a. clockwise direction and another in a counterclockwise direction, and means lfor alternately positioning said cutters for effective operation.

4. In a sand reconditionin class described, apair of icy indrical cutters havin rotary cutting blades, means for indepen ently rotating said cutters each in a di'erent direction, andl means for alternately positioning each said cutter for effective o eration. V

5. sand reconditioning machine of the machine of the.

ilo

4 mounted independently of the p class described, comprising a reciprocatory platform for carrying sand to be reconditioned, astationary frame adjacent said platform, a revolvable sand mixer mounted on said frame above the normal level of the sand, and means for lowering said mixer to operate on the sand as the platform is reciprocated under the sand mixer.

6. A sand reconditioning machine of the class described, comprising a reciprocatory platform adapted to be moved back and forth beneath a pluralit of hoppers to receive successive layers o material to be reconditioned, a revolvable cutting cylinder mounted above said platform and independently thereof, and means for lowering said cylinder to operate on the material to be mixed as the platform passes beneath said cylinder.

7. A sand reconditioning machine of the class described, comprising a`reciprocato platform adapted to be moved back and forth beneath a plurality of hoppers to receive successive layers of material to be reconditioned, a revolvable cutting cylinder above said platform, a plow in advance of said cutting cylinder, said cylinder and plow being atform and above the level ofthe materials on the platform, meansfor lowering the cutting cylin` der to operate upon the materials onthe platform, whereby the materials are mixed and aerated as the platform passes thereunder and means for lowering said plow,

whereby the materials may be remaved from the. platformas it asses under said\ low.

In testimony w ereof, I have -v ereunto signedmy name at Florence, New Jersey, this 31st day of May, 1928. l

LoUIs A. cAMERoT.. 

